Our users are older salespeople, most of whom don't understand the concept of a plugin, so telling them to update their flash player is not an option (I have tried in the past).
However, updating our application to Flex 4 (from 3.5) is something I would like to atleast plan on doing in the future.
The question is, what is the market saturation of flash player 10? What would be the easiest way to determine how many of our users have flash player 10? Any other hints/advice for considering upgrading to flex 4 would be great!